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1/*
2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23    * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#import "WebDocumentLoaderMac.h"
30
31#import "WebKitVersionChecks.h"
32#import "WebView.h"
33
34using namespace WebCore;
35
36WebDocumentLoaderMac::WebDocumentLoaderMac(const ResourceRequest& request, const SubstituteData& substituteData)
37    : DocumentLoader(request, substituteData)
38    , m_dataSource(nil)
39    , m_isDataSourceRetained(false)
40{
41}
42
43static inline bool needsDataLoadWorkaround(WebView *webView)
44{
45#ifdef BUILDING_ON_TIGER
46    // Tiger has to be a little less efficient.
47    id frameLoadDelegate = [webView frameLoadDelegate];
48    if (!frameLoadDelegate)
49        return false;
50
51    NSString *bundleIdentifier = [[NSBundle bundleForClass:[frameLoadDelegate class]] bundleIdentifier];
52
53    if ([bundleIdentifier isEqualToString:@"com.apple.AppKit"])
54        return true;
55    if ([bundleIdentifier isEqualToString:@"com.adobe.Installers.Setup"])
56        return true;
57    return false;
58#else
59    static bool needsWorkaround = !WebKitLinkedOnOrAfter(WEBKIT_FIRST_VERSION_WITHOUT_ADOBE_INSTALLER_QUIRK)
60                                  && [[[NSBundle mainBundle] bundleIdentifier] isEqualToString:@"com.adobe.Installers.Setup"];
61    return needsWorkaround;
62#endif
63}
64
65void WebDocumentLoaderMac::setDataSource(WebDataSource *dataSource, WebView *webView)
66{
67    ASSERT(!m_dataSource);
68    ASSERT(!m_isDataSourceRetained);
69
70    m_dataSource = dataSource;
71    retainDataSource();
72
73    m_resourceLoadDelegate = [webView resourceLoadDelegate];
74    m_downloadDelegate = [webView downloadDelegate];
75
76    // Some clients run the run loop in a way that prevents the data load timer
77    // from firing. We work around that issue here. See <rdar://problem/5266289>
78    // and <rdar://problem/5049509>.
79    if (needsDataLoadWorkaround(webView))
80        m_deferMainResourceDataLoad = false;
81}
82
83WebDataSource *WebDocumentLoaderMac::dataSource() const
84{
85    return m_dataSource;
86}
87
88void WebDocumentLoaderMac::attachToFrame()
89{
90    DocumentLoader::attachToFrame();
91
92    retainDataSource();
93}
94
95void WebDocumentLoaderMac::detachFromFrame()
96{
97    DocumentLoader::detachFromFrame();
98
99    if (m_loadingResources.isEmpty())
100        releaseDataSource();
101
102    // FIXME: What prevents the data source from getting deallocated while the
103    // frame is not attached?
104}
105
106void WebDocumentLoaderMac::increaseLoadCount(unsigned long identifier)
107{
108    ASSERT(m_dataSource);
109
110    if (m_loadingResources.contains(identifier))
111        return;
112    m_loadingResources.add(identifier);
113
114    retainDataSource();
115}
116
117void WebDocumentLoaderMac::decreaseLoadCount(unsigned long identifier)
118{
119    HashSet<unsigned long>::iterator it = m_loadingResources.find(identifier);
120
121    // It is valid for a load to be cancelled before it's started.
122    if (it == m_loadingResources.end())
123        return;
124
125    m_loadingResources.remove(it);
126
127    if (m_loadingResources.isEmpty()) {
128        m_resourceLoadDelegate = 0;
129        m_downloadDelegate = 0;
130        if (!frame())
131            releaseDataSource();
132    }
133}
134
135void WebDocumentLoaderMac::retainDataSource()
136{
137    if (m_isDataSourceRetained || !m_dataSource)
138        return;
139    m_isDataSourceRetained = true;
140    CFRetain(m_dataSource);
141}
142
143void WebDocumentLoaderMac::releaseDataSource()
144{
145    if (!m_isDataSourceRetained)
146        return;
147    ASSERT(m_dataSource);
148    m_isDataSourceRetained = false;
149    CFRelease(m_dataSource);
150}
151
152void WebDocumentLoaderMac::detachDataSource()
153{
154    ASSERT(!m_isDataSourceRetained);
155    m_dataSource = nil;
156}
157